Exploring the Neural Substrates of Self-Ownership and Memory. Dave Turk University of Aberdeen

Transcription

1 Exploring the Neural Substrates of Self-Ownership and Memory Dave Turk University of Aberdeen

2 Evaluative and Non-Evaluative Self Temporary ownership also leads to selfmemory biases. What are the neural mechanisms that foster these memory biases? How do they relate to previously reported self-memory areas (vmpfc, PACC) identified using evaluative encoding?

3 Where is Self? Data from Explicit Self-Referencing

4 Where is Self? Data from Explicit Self-Referencing 10, 52, 2 Kelley et al. (2002) Self > Bush

5 Where is Self? Data from Explicit Self-Referencing 10, 52, 2 Kelley et al. (2002) Self > Bush 0, 50, 8 Macrae et al. (2004) Self Remembered

6 Where is Self? Data from Explicit Self-Referencing 10, 52, 2 Kelley et al. (2002) Self > Bush 0, 50, 8 Macrae et al. (2004) Self Remembered 6, 56, 4 Johnson et al. (2002) Self > Semantic

7 Where is Self? Data from Explicit Self-Referencing 10, 52, 2 0, 50, 8 6, 56, 4 0, 54, 8 Kelley et al. (2002) Self > Bush Macrae et al. (2004) Self Remembered Johnson et al. (2002) Self > Semantic Schmitz et al. (2004) Self > Semantic

8 Where is Self? Data from Explicit Self-Referencing 10, 52, 2 0, 50, 8 6, 56, 4 0, 54, 8 Kelley et al. (2002) Self > Bush Macrae et al. (2004) Self Remembered Johnson et al. (2002) Self > Semantic Schmitz et al. (2004) Self > Semantic vmpfc is self region - Kelley et al.

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10 Neural Correlates of Ownership

11 Neural Correlates of Ownership

12 Neural Correlates of Ownership

13 Neural Correlates of Ownership

14 Neural Correlates of Ownership

15 Neural Correlates of Ownership

16 Neural Correlates of Ownership

17 Stimuli: 216 photographs of items found in supermarkets. Sizes: 250 x 250 pixels at 72dpi resolution. Cues: Ownership signaled by red or blue colour patch. 0ms 500ms 2500ms

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19 Neural Correlates of Ownership Self Other

20 Neural Correlates of Ownership 0.5 Self Other Self Owner Other

21 Neural Correlates of Ownership 0.5 Self Other Self Owner Other

22 Neural Correlates of Ownership 0.5 Self Other Self Owner Other

23 Neural Correlates of Ownership 0.5 Self Other Better Memory for Objects Owned by Self 0 Self Owner Other

24 Neural Correlates of Ownership 0.5 Self Other Better Memory for Objects Owned by Self 0 See also: Self Owner Other Cunningham et al. (2008) Consciousness & Cognition. Van den Bos et al. (in press) QJEP.

25 Neural Correlates of Ownership

26 Neural Correlates of Ownership

27 Does activation relate to memory?

28 Does activation relate to memory?

29 Does activation relate to memory? Parameter Estimate (β) Proportional Self-Memory Bias

30 Does activation relate to memory? Parameter Estimate (β) Proportional Self-Memory Bias

31 Does activation relate to memory? Parameter Estimate (β) Parameter Estimate (β) Proportional Self-Memory Bias Proportional Self-Memory Bias

32 Does activation relate to memory? Parameter Estimate (β) Parameter Estimate (β) Proportional Self-Memory Bias Proportional Self-Memory Bias

33 Does activation relate to memory? Parameter Estimate (β) Parameter Estimate (β) Parameter Estimate (β) Proportional Self-Memory Bias Proportional Self-Memory Bias Proportional Self-Memory Bias

34 How do these regions co-activate over time?

35 How do these regions co-activate over time? Regional Time-to-Peak Analysis Parameter Estimate (β) Time (Seconds)

36 A Temporal & Functional Neural Model of Ownership

37 A Temporal & Functional Neural Model of Ownership

38 A Temporal & Functional Neural Model of Ownership SFG/cACC: Attentional orientation to salient (Carretié et al., 2004), and positively rewarding objects (Liu et al., 2007). Anterior Inferior Parietal Cortex - SMG: Automatic activation of motor affordances associated with manipulable owned objects (Handy et al., 2003; Chao & Martin, 2000). Posterior Insula: Integration of emotion and behaviour (Dupont et al., 2003) during positively rewarding experience (Liu et al., 2007).

39 A Temporal & Functional Neural Model of Ownership What these data suggest is that: 1. Ownership captures attention - SFG/cACC 2. Ownership is rewarding to self - even for low value items - right posterior insula 3. Owned objects are processed in terms of their potential for use - left SMG (RH participants) This area is automatically activated for tools but only for OWNED tools here. Explicit cognitive encoding tasks (trait paradigm) might mask the importance of these implicit, autonomic, affective processes in SRE - Turk et al. (2008).

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41 But what about mpfc?

42 But what about mpfc?

43 But what about mpfc? Self Other

44 But what about mpfc? Self Other Activation for Objects Not Owned by Self

45 But what about mpfc? Self Other Activation for Objects Not Owned by Self

46 But what about mpfc? Self Other Activation for Objects Not Owned by Self Self-Owned Other-Owned

47 But what about mpfc? Self Other Activation for Objects Not Owned by Self Self-Owned Other-Owned vmpfc & PCC NOT specific to self.

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